GROUP ONE TRADING, L.P. Information

440 S. LASALLE STREET, CHICAGO, Illinois, 60605, (312) 347-8864

Report Date: 06/30/2014

Position Statistics

Total Positions 1,885
New Positions 464
Increased Positions 929
Decreased Positions 915
Positions with Activity 1,844
Sold Out Positions 419
Total Mkt Value (in $ millions) 912

Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.

Sector Weighting

Basic Materials 3.5%
Capital Goods 1.77%
Conglomerates 0.23%
Consumer Cyclical 2.6%
Consumer/Non-Cyclical 2.59%
Energy 11.2%
Financial 8.13%
Healthcare 16.63%
Services 20.05%
Technology 16.02%
Transportation 2.76%
Utilities 4.38%

1,885 Positions as of 06/30/2014

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
MEDICINES CO COM 60 6 10.96 2,663
QUINTILES TRANSNATIO HLDGS INC COM 60 -55 (47.62) 1,100
REGAL BELOIT CORP COM 60 60 New 918
CYTORI THERAPEUTICS INC COM 60 4 6.33 122,604
CANCER GENETICS INC COM 60 60 New 8,529
MARTHA STEWART LIVING OMNIMED CL A 59 -7 (9.99) 13,861
SUNESIS PHARMACEUTICALS INC COM NEW 59 59 New 39,229
PRIMO WTR CORP COM 59 15 32.76 15,400
PORTLAND GEN ELEC CO COM NEW 59 45 316.30 1,711
BIOTIME INC COM 59 31 112.89 17,287
ODYSSEY MARINE EXPLORATION INC COM 58 3 5.36 62,148
CORELOGIC INC COM 58 3 5.43 2,097
PEPCO HOLDINGS INC COM 58 58 New 2,163
DREAMWORKS ANIMATION SKG INC CL A 58 -261 (81.9) 2,641
CANTEL MEDICAL CORP COM 58 55 2,187.88 1,510
CELSION CORPORATION COM PAR $0.01 57 -163 (74.09) 21,861
BROADRIDGE FINL SOLUTIONS INC COM 57 4 7.69 1,400
AUDIOCODES LTD ORD 56 -89 (61.35) 12,659
FLUIDIGM CORP DEL COM 56 -395 (87.62) 2,162
GREIF INC CL A 55 -50 (47.52) 1,218